Boiler



- Disc. 29, 1942.. MaCGREGOR 2,306,738

' BOILER Filed March 4, 1940 2 Sheets-Sheet 1 ATTORNEY.

, Dec. 29, 1942; MaGREGR 2,306,738

BOILER Filed March 4, 1940 2 Sheets-Sheet 2 ,Z ,5, inf 4 ATTORN EY Patented Dec. 29, 1942 UNITED STATES PATENT OFFICE BOILER Peter MacGregor, Detroit, Mich.

Application March 4, 1940, Serial No. 322,125

15 Claims.

This invention relates to a boiler for steam or hot water heating by coal or oil or gas. More particularly this invention relates to a hot water or steam tubed house, and water heating boiler.

It is the purpose hereof to provide a boiler having vertically disposed therein in a novel manner a plurality of water or steam tubes.

'It is the object hereof to provide means within the boiler for independently producing hot water for domestic uses.

It is the further object hereof to provide improved means of scraping and removing the soot from the tubes.

It is the still further object to provide an improved boiler consisting of a minimum number of parts and readily adaptable to any type of steam or hot water heating.

This invention relates to an improved boiler over those disclosed in United States Patent No. 1,504,924, granted to applicant, August 12, 1924, and Canadian Patent No. 221,479, also granted to applicant, July 25, 1922.

This invention further relates to the combinations and arrangements of parts hereinafter set forth in connection with the appended drawings, illustrating a preferable embodiment thereof, it being expressly understood however, that I do not intend to be limited thereby, the scope of my invention being determined in light of the claims which follow.

In the drawings:

Figure 1 is a partially sectioned rear elevational view of the boiler.

Figure 2 is a partially sectioned side elevation thereof.

Referring to the drawings, the frame II, forming a heating unit has its lower space or fire chamber [2 available for grates for coal, gas, or oil heating.

The boiler shell I2 consists of removable insulated plates bolted on to the outside of the frame member II and also upon the top portion thereof. These plates, provided preferably with at least -16 and I1, respectively.

of an inch of asbestos lining or other suitable insulating material, are secured to said The vertical hot water or steam tubes longitudinally disposed within the boiler frame II are arranged in groups or four. Each group consists of a plurality of spacer tubes I8, tapered on their ends for communicating engagement between the lower header I3 and individual headers tween the stay tubes 29, the lower header I3, and

corresponding clamp I9, said tubes being oppositely threaded on the ends whereby when tightened they act as suporting stiffeners for retaining the spacer tubes in fixed position. It will be noted that packing nuts 2I and 26 are provided with a packing of heat resisting material for obtaining the proper water tight seal. By using tubes the boiler heating surface is increased to three or four times that of any house heating boiler now on the market. Furthermore actual tests show that this adaptation to house heating reduces the fuel cost more than one-third.

The steam chamber 22 preferably rectangular in shape and transversely disposed within the boiler frame II, communicates with the individual clamps or steam headers I9 by means of interconnecting threaded short stay tubes 23, with interconnecting pipe unions 2 Threaded communicating engagement is obtained between said stay pipes 23, steam header 22, and openings in top of said individual headers through the packing nuts 25 and 26 provided with packing of heat resisting material.

The hot water or steam pies 21 and 28 rearwardly disposed and communicating with the steam header 22 provide hot water or steam to a plurality of radiators throughout a building, with suitable pipe connections disposed therebetween.

Return pipes 25 and 31) from the radiators connected to the lower water header I3 of the boiler complete the hot water circuit, an inlet 3| from the waterworks being joined to said return pie 29 with hand valve 32 interposed therebetween. Opening 33 in the lower header I3 communicates with the return pipe 30 from the radiators.

A built in hot water compartment 34 with suitable water inlet 35 from the waterworks is dis posed within the lower water header I3 for heating water available for domestic uses. Outlet combustion waste products is rearwardly disposed in the top of the boiler.

In order to remove soot accumulations upon' the boiler tubes l8 and 29 an improved scraper 39 is provided for longitudinal scraping movement entirely within boiler i I. All soot removed drops through large openings in the lower header l3.

This scraper consists of scraper plates 40 with a plurality of openings through which all boiler tubes are loosely journaled. Loosely interposed between said plates and with respect thereto are a plurality of scraping washers 4| snugly fitting all boiler tubes. It will be noted that said washers may be fabricated from steel or copper wool. Longitudinal reciprocation of scraper 39 removes all soot from the tubes whereby the soot free tubes can more readily communicate heat to the water or steam contained therein. With this tube scraper made a part of the boiler, the cleaning of the tubes may takes place without interruption of the heating operation, or opening any part of the boiler, thus keeping soot from coming out into the house. It will be noted that the entire soot removing operation requires approximately three seconds.

Four spaced threaded rods 42 held to scraper 39 at points 43 are suitably connected by nuts 44 to a vertically reciprocable bracket 45. An eye or opening connection 46 centrally disposed on said bracket retains a suitable cable 41 preferably of crucible steel journaled over pulleys 48 and 49 and counterbalanced by the weight 50.

It will be noted that connection 5| communicatingly engaging steam pipe 28 with interposed shut off hand valve 52 provides a source of hot water supply to the top of a hot water storage tank when boiler is used as a hot water heater only, as for instance in the summer.

It will be noted that this boiler can be used as an air conditioning unit in hot Weather, when it is not used as a water heater. This is accomplished by allowing cool water to remain within the tubes, keeping the inlet valve 32 from the waterworks slightly open and allowing water to drain through very slowly. By blowing air through and between the tubes with a fan up through flues into the rooms, filtering the air as usual, a substantial cooling effect is obtained.

It will be noted that the boiler herein described discloses at least three times the heating surface in the tubes alone, than any other boiler heretofore known. Any cluster of tubes in the outer rows can be taken off without disturbing the others. If any of the tubes in the inside rows must be replaced an extra cluster on the outside must be taken out first.

It will be noted that the boiler herein described is so arranged as to be heated by any type of fuel, whether it be coal or oil or gas.

Having described my invention, reference should now be had to the claims which follow for determining the scope thereof.

tubes joined to said header,

I claim:

1. A hot water and steam tube boiler comprised of a frame having a fire chamber, a water header supported on said frame above said chamber, a plurality of water chambers, a plurality of groups of water tubes joined to said header, each group interconnecting a chamber, and a steam header with suitable outlets, communicating with said chambers, each group consisting of a plurality of spacer tubes and a central stay tube, the latter being in threaded engagement with said water header and with a water chamber.

2. A boiler of this class comprised of a frame having a fire chamber, a water header supported on said frame above said chamber, a plurality of water chambers, a plurality of groups of water each group interconnectinga chamber, a steam header with suitable outlets, communicating with said chambers, each of said groups of tubes being separately removable without affecting the other groups of tubes, and a hot water heating chamber with suitable water inlet and outlet built within said water header forming a part of the lower header casting.

3. A boiler of this class comprised of a frame having a fire chamber, a water header supported on said frame, a plurality of water chambers, a plurality of groups of water tubes joined to said header, each group interconnecting a chamber, a steam header with suitable outlets, communicating with said chambers, and a soot remover for said tubes consisting of perforated plates loosely journaled on said tubes, and a plurality of scraper washers loosely retained between said plates and also journaled on said tubes for engaging reciprocation thereon.

4. A boiler of this class comprised of a frame having a fire chamber, a water header supported on said frame, a plurality of water chambers, a plurality of groups of water tubes joined to said header, each group interconnecting a chamber, a steam header with suitable outlets communicating with said chambers, a hot water heating chamber with suitable water inlet and outlet built within said Water header and forming a part of the water header casting, and a soot remover for said tubes consisting of perforated plates journaled on said tubes and a plurality of scraper washers retained between said plates and also journaled on said tubes for engaging reciprocation thereon.

5. In a boiler of this class, a soot remover for the tubes thereof comprised of perforated plates loosely journaling said tubes, a plurality of scraping washers retained between said plates, each tube being snugly journaled by a plurality of washers, and counterbalanced means providing manual reciprocation of said soot remover entirely within the boiler shell.

6. A boiler of this class comprised of an insulated frame with a lower space defining a fire chamber, a water header supported above said chamber and having a water inlet, a plurality of water chambers, a plurality of groups of tubes communicating with said header, each group joining and communicating with one of the aforesaid chambers, and a steam header communicating with said chambers and with suitable outlets, each group consisting of a plurality of spacer tubes and a central stay tube, the latter being in threaded engagement with said water header and with a water chamber.

'7. A boiler of this class comprised of an insulated frame having a fire chamber, removable insulated plates corresponding to each wall of said frame and separately secured thereto, defining a boiler shell, a water header supported on said frame above said chamber, a plurality of water chambers, a plurality of groups of water tubes joined to said header, each group interconnecting a chamber, a steam header with suitable outlets communicating with said chambers, a hot water heating chamber with suitable water inletchambers, a plurality of groups of tubes joined to said header, each group interconnecting a chamber, an upper header with a suitable outlet, connecting with said chambers, a fluid heating chamber with a suitable inlet and outlet defined within said header, and a soot remover for the tubes, journaling the same for reciprocation thereon.

9. A boiler of this class comprised of a frame having a fire chamber, removable insulated shell members corresponding to and secured to each wall of said frame, a header supported above said fire chamber, a plurality of fluid chambers, and plurality of groups of tubes joined to said header, each group interconnecting a fluid chamber and each group consisting of a plurality of spacer tubes, and a central stay tube, the latter being in threaded engagement with said water header and with a water chamber, an upper header with a suitable outlet, communicating with said fluid chambers, and a soot remover for the tubes, journaling the same for reciprocating thereon.

10. A boiler of this class comprised of a frame having a fire chamber, a fluid header supported on said frame, a plurality of fluid chambers, a

plurality of groups of tubes joined to said header,

each group interconnecting a chamber, and a steam header with suitable outlets, communicat ing with said chambers, each group consisting of a plurality of spacer tubes and a stay tube, the latter being in threaded engagement with said fluid header and with a fluid chamber.

11. A hot water and steam tube boiler comprised of a frame having a fire chamber, a Water header supported on said frame above said chamber, a plurality of water chambers, a plurality of groups of water tubes joined to said header, each group interconnecting a chamber, and a steam header with suitable outlets, communicating with said chambers, each group consisting of a plurality of spacer tubes, and a central stay tube, the latter being in threaded engagement with said water header and with a water chamber, each of said groups of tubes being separately removable without affecting the other groups of tubes.

12. A boiler of this class comprised of an insulated frame with a lower space defining a fire chamber, removable insulated shell members corresponding to each wall of said frame, and separately secured thereto, a water header supported above said chamber and having a water inlet, a plurality of water chambers, a plurality of groups of tubes communicating with the said header, each group joining and communicating with one of the aforesaid chambers, and a steam header communicating with said chambers and with suitable outlets, each group consisting of a plurality of spacer tubes and a central stay tube, the latter being in threaded engagement with said water header and with a water chamber.

13. A boiler of this class comprised of a frame having a fire chamber, removable insulated shell members corresponding to and secured to each wall of said frame, a header supported above said fire chamber, a plurality of fluid chambers, a plurality of groups of tubes joined to said header, each group interconnecting a fluid chamber, each group consisting of a plurality of spacer tubes,

and a central stay tube, the latter being in threaded engagement with said water header and with a water chamber, an upper header with a suitable outlet communicating with said fluid chambers, and a fluid heating chamber with suitable inlet and outlet defined within said header.

14. In a boiler having a plurality of tubes, a soot remover for the said tubes comprised of perforated plates loosely journaling said tubes, and a plurality of scraping washers retained between said plates, each tube being snugly jour naled by a plurality of washers.

15. A hot water and steam tube boiler comprised of a water header, a plurality of water chambers, a plurality of groups of water tubes joined to said header, each group interconnecting a chamber, and a steam header with suitable outlets, communicating with said chambers, each group consisting of a plurality of spacer tubes, and a central stay tube, the latter being in threaded engagement with said water header and with a water chamber.

PETER MAcGREGOR. 

